Steganomobile

222-33-555-555-7-44-666-66-33

To resolve the challenge, we have to think of the old mobile keyboard style.

Image from android.stackexchange.com

Let’s interpret the numbers as inputs.

• 222 : C
• 33 : E
• 555 : L
• 555 : L
• 7 : P
• 44 : H
• 666 : O
• 66 : N
• 33 : E

The word we’re looking for is cellphone.